1 5 2 3 4 R21340010 34 21 Disassembling and assembling rear brake caliper Assembling rear brake caliper • Coat the new sealing rings with brake fluid and insert them into the left and right brake caliper bores. • Coat both brake caliper pistons with brake fluid and install them. Disassembling rear brake caliper – Integral ABS Drain rear wheel circuit ( a 34.17). – Remove the brake caliper. e Attention: Keep the brake pistons parallel with their bores when installing. • Close the bleed screw. • Hold a cloth over the brake caliper piston. • Carefully press out brake piston (3) with a com- pressed air gun applied to the connecting bore; work at low air pressure.
• Coat the adapter plate locating pins with Shell Retinax A and install the adapter plate. • Insert locating plate (5) into brake caliper. e Attention: Keep fingers away from gap between piston and side contact face of brake pads; risk of injury. L Note: The installed position must be correct (arrow point- ing in forward-travel direction). • Remove sealing rings (4) from left and right bores. • Inspect the brake caliper piston for hairline cracks, score-marks and other damage. • Using piston resetting tool, BMW No. 34 1 531 , press the pistons fully back. • Integral ABS Fill and bleed rear wheel circuit ( a 34.26). X Tightening torque: Bleed screw to brake caliper..........................
5 Nm X Tightening torque: Brake caliper to rear wheel drive .................. 40 Nm Brake hose to brake caliper ......................... 18 Nm Bleed screw to brake caliper.......................... 5 Nm 34.7